(2001). OECD historical statistics: 1970-2000. OECD.
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Dyfyniad Arddull Chicago
OECD Historical Statistics: 1970-2000. Paris, Cedex, France: OECD, 2001.
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Dyfyniad MLA
OECD Historical Statistics: 1970-2000. OECD, 2001.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.